Proclaiming the Republic of Latvia, the economic structure in the new state changed. All urban municipalities had to take care of the master plan development in order to deal with the issues of the perspective development and functional zoning, create a qualitative urban environment. Since 1925 a high-quality therapeutic mud had been obtained in the surroundings of Liepaja. It was necessary to implement some improvement work on the seashore and in the resort – reconstruct the bath establishment. The new master plan was started to be worked out in the Technical Department of Liepaja City Board to make a qualitative urban environment in the city. The concept of facilitation was changed for Liepaja Seaside Park, and it complied with the development tendencies of public parks, which had appeared in Europe during the interwar period. The Seaside Park encountered pleasant changes: the landscape was developed according to Latvian traditions by prominent landscape architects. Previous research: Liepaja urban construction and the culture of landscape formation in the Republic of Latvia have not been analysed sufficiently, the research about the formation of the city greenery system is missing. Topicality of the subject: ascertain the cultural-historical environment and landscape values of Liepaja in order to improve the city inhabitants’ quality of life. Research goals: find out the architectonic spatial composition of Liepaja Seaside Park, the evolution of the functional and artistic solution in the 20s and 30s of the 20th century, identity of Liepaja, when implementing development projects.